I tried one about a year ago. I must have misread it because I thought it had tritium and it doesn't. The dot is rather small and didn't collect enough light for my tastes. The concept is different and kinda cool. I ended up sending it back for a refund and getting the Ameriglow Hackathorne setup for both my G21 and G30.

I've been trying to use them...not impressed. Like HGxyz said, okay in really bright light, but nothing else. They are definately not accurate enough for me allowing about 4 degrees of rotation in which they "look" aligned, but really are not. I'd almost rather have no sights.

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Good Shooting, MarkCO
.40 S&W Club #1, 1911 Club #1067
NRA Life Member and Certified Instructor
www.CarbonArms.us